400044044 has 12 divisors (see below), whose sum is σ = 700708344. Its totient is φ = 199841664.

The previous prime is 400044041. The next prime is 400044079. The reversal of 400044044 is 440440004.

It is not an unprimeable number, because it can be changed into a prime (400044041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40037 + ... + 49020.

It is an arithmetic number, because the mean of its divisors is an integer number (58392362).

Almost surely, 2^400044044 is an apocalyptic number.

It is an amenable number.

400044044 is a deficient number, since it is larger than the sum of its proper divisors (300664300).

400044044 is a wasteful number, since it uses less digits than its factorization.

400044044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90184 (or 90182 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 400044044 is about 20001.1010696911. The cubic root of 400044044 is about 736.8333419828.

Adding to 400044044 its reverse (440440004), we get a palindrome (840484048).

The spelling of 400044044 in words is "four hundred million, forty-four thousand, forty-four".